Datasheet LT3690 (Analog Devices) - 3

LT3690
e lecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C, VIN = 12V unless otherwise noted (Notes 3, 7). PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Fixed Undervoltage Lockout l 3.0 3.9 V VIN Overvoltage Lockout OVLO VIN Rising l 36 38.2 40 V Quiescent Current from VIN VEN = 0.2V 0.1 1 µA VBIAS = 3V, VFB = 0.85V Not Switching l 35 60 µA VBIAS = 0V, VFB = 0.85V Not Switching 110 150 µA Quiescent Current from BIAS Pin VEN = 0.2V 0.1 1 µA VBIAS = 3V, VFB = 0.85V Not Switching l 70 110 µA VBIAS = 0V, VFB = 0.85V Not Switching –3 –10 µA Boost Schottky Diode Drop (VBIAS – VBST) IBIAS = 200mA 820 950 mV BST Voltage (Note 5) (VBST – VSW) Minimum BOOST Voltage Above SW, ISW = 4A l 1.6 2.3 V BST Pin Current ISW = 4A 70 140 mA BST Pin Leakage VSW = 12V, VBIAS = 0V 0.1 6 µA HS Switch Drop (VIN – VSW) ISW = 4A 370 600 mV HS Switch Current Limit (Note 6) 5.5 6.6 8 A HS Switch Leakage Current VSW = 0V 0.1 2 µA HS Minimum Switch Off-Time l 210 ns LS Switch Off Voltage Drop ISW = 4A 700 850 mV LS Switch On-Resistance ISW = 4A, VCCINT = 5V 30 60 mΩ LS Switch On-Resistance ISW = 4A, VCCINT = 4V 30 90 mΩ LS Switch Current Threshold 4 5 6.5 A LS Switch Leakage Current VEN = 0V, VSW = 12V, VBST = 12V 0.1 10 µA VEN = 0V, VSW = 12V, VBST = 12V, TJ = 125°C 95 µA VCCINT Pin Output Voltage IVCCINT = 0µA 4.3 4.9 5.3 V VCCINT Pin Output Voltage IVCCINT = –10mA 4.2 4.8 5.3 V EN Input Current VEN = 12V 8 15 µA VEN = 2.5V 2.5 6 µA EN Input Voltage, Enable 1.5 V EN Input Voltage, Disable 0.4 V UVLO Threshold Voltage 1.1 1.33 V UVLO Pin Current VUVLO = 1.33V –2.0 –3.8 µA UVLO Pin Current VUVLO = 1.1V 0.1 1 µA UVLO Pin Current Hysteresis IUVLO at 1.1V – IUVLO at 1.33V 1.2 2 2.8 µA Pull-Up Current at SS Pin VSS = 0.8V –1.2 –2 –2.8 µA Tracking Offset (VSS – VFB) VSS = 0.4V –4 7 15 mV SYNC Input Voltage High 0.8 V SYNC Input Voltage Low 0.4 V SYNC Input Resistance to GND 150 300 600 kΩ SYNC Input Frequency 0.17 1.5 MHz Feedback Reference Voltage 792 800 808 mV l 786 800 814 mV FB Pin Bias Current Flows Out of Pin VFB = 800mV l –8 –40 nA FB Voltage Line Regulation 3.6V < VIN < 36V 0.001 0.01 %/V 3690fb For more information www.linear.com/LT3690 3 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts